From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6BB33C2D0A3 for ; Tue, 3 Nov 2020 08:32:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0B3F522264 for ; Tue, 3 Nov 2020 08:32:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Eq5l+fd+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727554AbgKCIcr (ORCPT ); Tue, 3 Nov 2020 03:32:47 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:23971 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725982AbgKCIcq (ORCPT ); Tue, 3 Nov 2020 03:32:46 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1604392365; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0AVrrnFk2LK6xv5QQDL/L5IslzwzGSKzr0bCkym7Zn8=; b=Eq5l+fd+VKF6HkfsP/HWOmzC/VRokebi+TMHAhFuJOPRPnxdkXObT5BhTVNalFgGM5XAzc o5kkbogs6o3gqb4kdnCsDp9Qis4l6tM2zrt+IToQf8Zq7HRCPod0zr3qwaClTwvSEtLrzz STaRzHtfm50lw+4pupKqgkXB8xfWG9M= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-358-msbyy7JzMaanGxALteOV5Q-1; Tue, 03 Nov 2020 03:32:43 -0500 X-MC-Unique: msbyy7JzMaanGxALteOV5Q-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id AAF5E8030C4; Tue, 3 Nov 2020 08:32:42 +0000 (UTC) Received: from localhost.localdomain (ovpn-8-30.pek2.redhat.com [10.72.8.30]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0C21E5C5DE; Tue, 3 Nov 2020 08:32:39 +0000 (UTC) Subject: Re: [PATCH 0/3] mdraid sb and bitmap write alignment on 512e drives To: Chris Unkel Cc: linux-raid , open list , Song Liu References: <20201023033130.11354-1-cunkel@drivescale.com> From: Xiao Ni Message-ID: Date: Tue, 3 Nov 2020 16:32:37 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/03/2020 02:59 AM, Chris Unkel wrote: > Hi Xiao, > > That particular array is super1.2. The block trace was captured on > the disk underlying the partition device on which the md array member > resides, not on the partition device itself. The partition starts > 2048 sectors into the disk (1MB). So the 2048 sectors offset to the > beginning of the partition, plus the 8 sector superblock offset for > super1.2 ends up at 2056. > > Sorry for the confusion there. > > Regards, > > --Chris Thanks for the explanation. I still have some questions in other emails about your patch. Could you have a look when you are free. Regards Xiao